Removed OS X from Travis CI build

See: travis-ci/travis-ci#2312

Author: pawelad

.travis.yml

@@ -8,29 +8,9 @@ matrix:
         - os: linux
           python: 3.4
           env: TOXENV=py34
-        # Use generic language for OS X
-        - os: osx
-          language: generic
-          env: TOXENV=py27
-        - os: osx
-          language: generic
-          env: TOXENV=py34
-
-# Perform the manual Python installation steps on OS X
-before_install:
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update          ; fi
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]] && [[ "$TOXENV" == "py27" ]]; then brew install python; fi
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]] && [[ "$TOXENV" == "py34" ]]; then brew install python3; fi
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]] && [[ "$TOXENV" == "py27" ]]; then virtualenv venv -p python; fi
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]] && [[ "$TOXENV" == "py34" ]]; then virtualenv venv -p python3; fi
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then source venv/bin/activate; fi
 
 install:
   - pip install tox --use-mirrors
 
 script:
   - tox
-
-env:
-  - TOXENV=py27
-  - TOXENV=py34